2D Laminar Flame for Ozone Combustion

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2D Laminar Flame for Ozone Combustion PECOS Center Research Applications Wall Bounded Turbulent Flows External Aerodynamics Combustion Magnetically Confined Plasma Algorithms & Modeling Predictive Validation and UQ Model Inadequacy Forward and Inverse Problems Hybrid LES & RANS turbulence models Direct Numerical Simulation of Turbulence Bayesian Methods Affiliated Faculty Ivo Babuska Omar Ghattas Tom Hughes Tinsley Oden Greg Rodin Philip Varghese Robert Moser Director Research Staff: Danial Faghihi, Damon McDougal, Craig Michoski, Todd Oliver, Chris Simmons, Roy Stogner Brief description of some of the research activities in PADAS: Fast algorithms for robust (i.e., automatic, black box) analysis for medical images. Typically, problem-specific algorithms Top left image: MRI FLAIR Image of patient with Grade IV glioma. Top right image: Estimated segmentatio to Grey matter, white matter, cerebrospinal fluid, and tumor Bottom image: Spatial frequency of adult glioblastoma with 3D surface rendering (top) and 2D multiplanar slices (bottom). These tumors tend to appear much more frequently in some brain regions, and this depends on age. The Statistical atlas was constructed with registration algorithms. 2D Laminar Flame for Ozone Combustion Funding: DOE, SNL, NASA, GE, DOD

Wall Bounded Turbulent Flows - PECOS DOF: 544 billion CPU time: 400 mil core-hr with 524k cores (MIRA, ANL) Generated Data: 137 TBytes (76 snapshots, 1.8 TBytes / snapshot) Largest simulation of wall-bounded turbulent flow ever performed Coherent vortex structure of wall- bounded turbulence. Each tube represents a single vortex core.

Hybrid RANS/LES - PECOS Hybrid RANS/LES turbulence models are useful in many engineering flows (e.g. cars and planes) A new model addresses shortcoming in previous hybrid models The PECOS hybrid model is applicable to a wide range of complex turbulent flows Evolution of a stalled airfoil after a stall-control actuation pulse. The pulse causes the separated flow to partially reattach resulting in increased lift and reduced drag. The simulation was performed with the new hybrid RANS/LES model developed at PECOS.